Ideas on the classification of grasses are in a constant state of flux. Current work in this field is being conducted in many centres as can be seen from the proceedings the symposia on the classification and evolution of grasses from 1986 onwards (Soderstrom, Hilu, Campbell and Barkworth 1987; Jacobs and Everett 2000; J.T.Columbus et al 2007; Seberg et al. 2010).

The first check-list is a list of currently accepted GrassWorld species with authors, place of publication and TDWG Level 1 Distributions - EUROPE, AFRICA,TEMPERATE ASIA,TROPICAL ASIA, AUSTRALASIA, PACIFIC, NORTH AMERICA, SOUTH AMERICA, ANTARCTIC. Subfamily and Tribe Classification follow GPWG and subsequent grass phylogenetic literature.